Pumping apparatus for anchoring in a well bore



Nov. 24, 1964 B. C MALONE 3,158,200

PUMPING APPARATUS FOR ANCHORING IN A WELL BORE.

Filed Aug. 9, 1961 3 Sheets-Sheet l 155/9 C. Mc7/0/72 INVENTOR.

Nov. 24, 1964 B. c. MALONE 3,158,200

PUMPING APPARATUS FOR ANCHORING IN A WELL BORE Filed Aug. 9, 1961 3Sheets-Sheet 2 J/ 1 3 v 6/! 90 w 22\ g; Q J

5/// 9/ C Ma/afle IN VEN TOR.

ATTORNEY) Nov. 24, 1964 B. c. MALONE 3,158,200

PUMPING APPARATUS FOR ANCHORING IN A WELL BORE Filed Aug. 9. 1961 sSheets-Sheet s 90 5667 [IX J0 6' 90 5%: I 674 65 6/a H i 32 A W 70 5/ yC. Mar/one 22 I INVENTOR.

' BY i A 7JN. V FM ATTO/P/VEVJ United States Patent 3,158,290 ruwrrnqnAPPARATUS FQR AN CHURING EN A WELL BER Billy C. Malone, Houston, Tern,assignor to Lynes, End, a corporation of Texas Filed Aug. 9, 1% Ser. No.130,306 14 Claims. (Cl. 166l%} The present invention relates to a welltool for connection with a well string to be lowered into a well bore,and more particularly to a pump arrangement for anchoring in a well boreon a well string whereby fluid may be circulated through the well stringand through the pump arrangement in either direction and for pumpingfluid through the well string in one direction.

In the drilling of oil and gas wells in unproven territory or area, itis desirable to test various formations before the expense of the wellcompletion is incurred in order to determine whether or not the well iscommercially worthwhile.

At the present time, this testing operation is carried out by firststopping drilling operations, then removing the drill string from thewell bore and then lowering the packer tool into the well bore on atubing string. The packers are set in the well bore so as to straddle orspan the indicated producing formation and an opening is provided in thetubing between the packers so as to obtain a sample of the formationfluid in the tubular string. The flow from the producing formation intothe tubing string is accomplished by running a swab tool through thetubing string. This serves to urge or encourage flow from the zone beingtested into the tubing string whereupon the tubing string and thetrapped sample therein may be removed from the well bore.

In another form of testing, a chamber is provided in the drill stringadjacent the bit for trapping formation fluids therein. However, thisprocedure is extremely undesirable because the sample may becontaminated with drilling fluids. If the formation pressure is tested,drilling fluid may contaminate the formation and block it off partiallyto cause inaccurate measurements of formation pressure and flow rate.

It can be appreciated that a great deal of time, trouble, and expense isinvolved in testing operations as they presently exist, and the presentinvention for one of its objects has the provision of a tool which maybe lowered into a well bore on a drill string and which enables thetesting of a particular zone with far more precision and accurateresults than heretofore possible. I

More particularly, the present invention is directed to a well toolwhich is adapted to be lowered into a well bore on a well string, suchas the drill string, and which eliminates the necessity of lowering aswab through the well string in order to draw a sample of fluid into thewell string from the well bore.

Yet a further object of the present invention is to provide a pumpingarrangement for a well tool which may be connected to the lower end of awell string and to the upper end of a packer section, such pumpingarrangement including valve means to enable well fluid to be circulateddown through the well string for setting the packer section or forconducting treating operations or other well operations and which valvemeans is constructed and arranged so that when the well string isthereafter reciprocated relative to the anchor packer section, wellfluid is pumped from the well bore into the well string.

Still a further object of the present invention is to provide a welltool which eliminates the necessity of lowering a tubing string into thewell bore and then running a swab through the tubing string in order toobtain a sample of well fluid.

Still another object of the present invention is to pro- 3,l58,2fl0Patented Nov. 24, 1964 vide a well tool which may be lowered into a wellbore rocated, well fluid is pumped from the Well bore into the tubingstring.

A further object of the invention is to provide a pumping arrangement tobe lowered into a well bore on a well string including an outer housingto be anchored in the well bore, a piston reciprocably mounted in saidhousing and connected to the lower end of the well string wherebyreciprocation of the well string pumps fluid therein.

Yet a further object is to provide a test tool in which may beincorporated devices for measuring various formation conditions.

Other objects and advantages of the present invention will become morereadily apparent from a consideration of the following description anddrawings wherein:

FIG. 1 is a vertical view partly in section illustrating the presentinvention positioned in' a well bore on a well string, the pump sectionbeing illustrated at the upper part of the drawing, and the packer oranchor section being illustrated in the lower part of FIG. 1;

FIG. 2 is a vertical view similar to FIG. 1, but illustrating the pumpsection of the present invention in one half sectional view and thepackersection anchored in the well bore with the component parts of thepump shown in position for accommodating fluid circulation downwardlythrough the pump section;

FIG. 3 is a sectional view of the pump section of the present inventionillustrating the position of its component parts when it is to be usedto pump fluids from the well bore into the well string;

FIG. 4 is a sectional view similar to MG. 3 but showing the well stringin its lowered position relative to the anchored packer section to pumpfluids into the well string;

PEG. 5 is a sectional view similar to FIG. 4 and showing the well stringlifted relative to the anchored packer section to complete one cycle, orpump stroke, in the pumping operation; and 7 FIG. 6 illustrates analternate'embodiment of'the invention. 7.

Attention is first directed to FIG. 1 of the drawings wherein thepresent invention is designated generally by the numeral 6. Theinvention 6 includes the pump section designated generally by thenumeral 7 and the packer or anchor section designated generally by thenumeral 8. The pump section 7 is secured in the well string above theanchor or packer section 8, it being contemplated that the tool 6 willbe lowered into the well bore 9 on a well string lit as illustrated inFIG. 3 of the drawings.

The packer section flincludes at least one inflatable element thereon,and two inflatable packer elements 11 and 12 are shown in the drawings.The spaced inflatable packer elements 11 and 12 are connected togetherby the portion 13, and the packer section 8' is supported on the mandrelor pipe 15. The structural arrangement of the spaced inflatable elements11 and 12 and their arrangement on the pipe 15 may be in the form asdisclosed in Patent No. 2,831,541, issued to G. E. Conover on April 22,1958.

The pump section 7, which is formed above the packer of the well string10 so as to inflate the elements 11 and 12 to anchor the packer section8 in the Well bore 9 as illustrated at 17 and 18 of FIG. 2. This sealsoff the formation 20 which is to be tested and also anchors the packersection 8 in the well bore 9 so that the well string may then bereciprocated so as to draw well fluids from the formation through thepassages 21 in the connection portion 13 between the elements 11 and 12.and into the passage 22 of the mandrel 15.

Continued reciprocation of the well string 10, as will be described ingreater detail hereinafter, relative to the anchored packer section 8will cause the well fluids to pass upwardly into the well string 16above the pump section 7.

The present invention will be described in its use in con nection withthe packer section 8 which includes the inflatable elements 11 and 12.However, it should be understood that under some circumstances it may bedesirable to use other forms of packer means or some other suitablearrangement for anchoring the pump section 7 in the well bore so thatthe well string 16 may be reciprooated so as to pump well fluids in thewell string. Also, it can be appreciated that it may be desirable tocirculate fluids in well string 10 for treating operations or forconducting operations other than inflating elements 11 and 12. I

The pump section '7 generally includes two portions, one of which is theouter cylindrical housing 39 which forms an extension on the mandrel 15of the packer section 8. The other portion 31 assumes the generalconfiguration of a piston which telescopically fits within the housing30 as illustrated in FIG. 1 of the drawings, the portion 31 beingadapted for connection to the well string 10 as best illustratedin FIG.3 of the drawings. The housing 30 includes valve means designatedgenerally by the numeral 32, and the piston 31 also includes valve meansdesignated generally by the numeral 33. The valve means 32 in thehousing and the valve means 33 in the piston 31 are constructed andarranged so that well fluids may be circulated through the bore 16 ofthe well pipe 10 and through the piston 31 and housing 30 in bothdirections to perform various operations, such as to inflate theelements 11 and 12. As previously noted, the structural arrangement ofpacker sect-ion 8 including pipe 15 and packers 11 and 12 is disclosedin Patent 2,831,541, and mandrel 15 may be initially in inflatedposition as the tool is lowered into the well bore. When the tool ispositioned at the desired elevation in the well bore, fluid may bepumped down bore 16 of the well string 10 to inflate packers 11 and 12and expand them as shown in FIG. 2

of the drawings.

It can be appreciated that pipe 15 is connected to housing 30 which inturn is connected to well string 10 by the keys 100 and keyways 101whereby the pipe 15 may be manipulated as described in the patent abovereferred to whereby the pipe 15 and bore 16 of the well pipe may becommunicated by ports 36 above the packer section 8 to the well bore, orthe pipe 15 and bore 16 may be selectively communicated below the packersection 8, or between the packers. As previously stated, Patent2,831,541 gives a complete structural detail of the packer section 8,including the manner of manipulating mandrel 15 relative to the anchoredpackers.

Since the housing 30 is connected to pipe 15 and since the pipe 15 islocked to packers 11 and 12 as disclosed in the patent, inflation of thepackers anchors the housing 30 in the well bore 9. The well string 19then may be reciprocated relative to housing 30 whereupon the valvemeans 32 and 33 cooperate to pass fluid therethrough and up into thewell string 10.

As shown in FIG. 2, the housing 30 may be formed of any suitable numberof sections to facilitate manufacture. As illustrated, the housing 30includes a cylindrical portion 40 which is connected at its lower end bysuitable means such as threads 41 thereon to the pipe or mandrel 15. Asimilar cylindrical portion 42 is connected to the upper end of 40 bycooperating threads 43. Suitable seal means as represented by the sealring 44 in the groove 45 are provided for sealing oil fluid leakagebetween 40 and 42. The upper end of 42 is provided with a cap 46 whichmay be suitably connected to 42 by any suitable means such as threads47, the cap 46 including an annular shoulder 48 so as to limit thetravel of piston 31 in the housing 30 as will be described in greaterdetail hereinafter. Such arrangement also forms a support for connectingthe piston portion 31 and housing 30 as well as the packer section 8 asthey are lowered into the well bore 9 on the well string 10.

The valve means designated generally at 32 in the housing 30 includes avalve element 50, which valve element is supported on the support 51formed in the housing 30. It will be noted that the support 51 isprovided with a central passage means 52 as well as additional passagemeans 53 which extend therethrough and provide access for fluid flowthrough valve means 32 as will be described hereinafter. The support 51may be in the form of an annular ledge within the housing 30 as shown inthe drawings. The valve element 50 includes an enlarged annular endportion 57 and an enlarged annular end portion 58 and the centralportion 59 which extends longitudinally between the end portions 57 and58, the central portion being reduced in diameter relative to theenlarged end portions as shown in the drawings. Thus, the valve element50 may move longitudinally within the housing 30, such movement beinglimited by engagement of the enlarged end portions 57 or 58 with thesupport 51. It is to be further noted that the enlarged end portions 57and 58 are of a suitable size so that regardless of the position of thevalve element 50 within the housing 30, the passage means 53 in thesupport 51 is not blocked 011.

The mandrel 15, which is connected by the threads 41 to the outerhousing 30, extends upwardly into the housing 30 to form-a guide 60. Itwill be noted that the guide 60, which is concentrically arranged withinthe housing 30, is of a smaller diameter than the inner diameter of thehousing 39 to provide a space for receiving the sleeve 61 thereabout.The sleeve 61 fits within the space between the guide 69 and the innerwall of the housing, and is provided with seal means 62 to form a fluidseal between the inner wall of the housing 30 and sleeve 61. Also, anannular ledge 64 is provided adjacent the lower end of guide 60 forseating the end 71 of sleeve 61 when it is in its lowermost position asshown in FIG. 2 of the drawings. Suitable seal means 65 areprovided forsealing off between the guide 60 and the sleeve 61 as the sleeve 61moves longitudinally relative to the guide 60 during operation of thevalve means 32 as will be described in greater detail hereinafter.

It will be noted that the sleeve 61 is counterbored as shown at 67 atits upper end so that when the valve element 50 is in its lowermostposition as shown in FIG. 2 of the drawings and when the sleeve 61 is inits lowermost position as shown in FIG. 2 of the drawings, the sleeve 61and enlarged end 58 of the valve element 50 are radially spaced toprovide a passage means 68 for,

conducting fluid through the valve means 32.

A port means 70 is provided in the lower end of the housing 30 andcommunicates with the lower end 71 of sleeve 61. When the fluid pressurein the well bore 9 exceeds the fluid pressure existing within the wellstring and within the housing 30, the sleeve 61 will bemovedlongitudinally of the housing 30 until its upper end 72 abuts thesupport 51 as illustrated in FIG. 3 of the drawings. It will be notedthat the guide 60 is of suitable axial extent so that when the sleeve 61is in its uppermost position as shown in FIG. 3 of the drawings, theguide 60 and sleeve 61 are in contact for a substantial portion of theaxial extent of the sleeve 61 so as to properly center the sleeve 61during its movement and operation in the housing 30. Also, the sealmeans 65 between the guide 60 and sleeve 61 is always in contact withthe inner wall of the sleeve 60 so as to form a fluid seal therebetween.

The piston 31 includes an elongated portion which is reduced in diameterrelative to the piston end 76. Seal means 75 are provided about theenlarged piston end 76 so that the piston end 76 is sealably engagedwith the outer housing 30 during longitudinal movement of the piston 31.The piston, or piston element 31, includes valve means 33, which valvemeans has components that correspond to the components of the valvemeans 32. For example, a guide 64) is concentrically formed within theelement 31 and extends longitudinally upwardly from the enlarged pistonend 76. A passage 22 extends through the guide 60' and end 76 for thepassage of fluid therethrough. The guide 69' includes an annularshoulder 64' for receiving the lower end 71 of the sleeve 61'. The guide60 is spaced relative to the inner wall of the piston element 31 so asto provide a recess for receiving the sleeve 61', and seal means 62' areprovided between the sleeve 61 and the inner wall of the piston element31. Also, suitable seals 65' are provided between the guide 60 and thesleeve 61'.

The sleeve 60' is provided with a counterbore 67 which provides apassage 6% between the enlarged end 58' and sleeve 61 as shown in FIG. 2of the drawings.

The piston element 31 also includes an annular support 51' which isprovided with passage means 52' and 53 therethrough. The support 51carries a valve element 50 having enlarged ends 57' and 58 connectedtogether by the central portion 59' which central portion is of asmaller diameter than the annular enlarged end portions 57' and 58whereby the valve element 56' may move up and down relative to itssupport 51'.

The outer housing 3% is provided with port means 80 which communicatewell fluid to the annular space 81 surrounding the reduced portion ofpiston element 31 on one side of the enlarged piston end 76 and alsocommunicate with the end 71' of the sleeve 61 through the port orpassage means 82 in the piston element 31 immediately above the enlargedend 76 as shown in FIG. 2 of the drawings. Thus, as long as fluidpressure in the well string 11' is greater than the fluid pressure inthe well bore, the sleeve 61' and the sleeve 61 will assume the positionshown in FIG. 2 of the drawings to enable fluids to be communicatedthrough the well string 10, the valve means 33, and the valve means 32.

Normally, the present invention will be used in well bores which have afluid medum therein. In the operation of the present invention, it canbe connected to the lower end of a well string, such as the drillstring, and lowered into a well bore until the packer section 8 isdisposed so that the packer elements 11 and 12 span the formation 20which is to be tested. The fluid pressure within the well string may beincreased so that the sleeve elements 61 and 61 assume the position intheir respective valve means 33 and 32 as illustrated in FIG. 2 of thedrawings. When this occurs, fluid pressure may be communicated throughthe well string 10 to the inflatable elements 11 and 12 so as to inflatethe elements and anchor them in the well bore. When this has occurred,the outer housing 30 of the pump section 7 is anchored in the well borewhereupon the portion 31, or the piston element 31, may be reciprocatedwithin the housing 30 so as to effect a pumping action to draw fluids inthe 'pas sages 21 from the formation 21} and into the well string 10above the pump section 7.

In FIG. 3, the pump section designated generally at 7 is shown when thepump pressure within the well string 16 has been relieved. When the pumpat the earths surface is shut off or reduced in speed, the fluidpressure existing in the well bore 9 will act through the port means 74in the housing 39 and through the port means 80 and 82 in the pistonelement 31 so as to move the sleeves 61 and 61 upwardly until theirupper end 72 and 72' engage the supports 51 and 51, respectively. Whenthis occurs, it will be noted that the valve elements 513 and S0 in thevalve means 32 and 33 engage their respective sleeves 61 and 61' so asto close off the valve means 32 and 33. The valve element 50 and thevalve element 50' are pro- 6 vided with suitable seal means and 94) ontheir enlarged ends 58 and 58', respectively, whereby the valve elements50 and 50' may sealably engage with their respective sleeves 61 and 61'.

FIG. 4 illustrates the relative position of the components of the valves32 and 33 at the end of one-half cycle of the pump stroke. it will benoted that the piston element 31 and well string 16 have been moveddownwardly relative to the housing 31) which is anchored in the wellbore 9. The telescoping movement of the piston element 31 within thehousing 311 causes the valve element 51} to remain in the positiondescribed with regard to FIG. 3. However, the presence of fluid withinthe housing 30 in the space 91 between the valves 32 and 33 and thetelescoping of the valve element 31 downwardly within the housing 30will cause the valve element 56' to move upwardly relative to itssupport 51' as illustrated in FIG. 4 of the drawings. When this occurs,the valve element 50' will move to a position relative to its respectivesleeve 61 so that the passage 53' in the support 51' may communicatethrough 68 with the passage 22' in the guide 60' and piston head 76 andwith the chamber 91 between the valve means 32 and 33. Thus, any fluidin the chamber 91 will be moved through the passage means 22, 68', and53 above valve means 33 and into the passage 16 and well string 10.

FIG. 5 illustrates the next one-half cycle of movement of the valveelement 31 relative to the anchored housing 30, and in this cycle of thepump stroke, it will be noted that the relative position of the valveelemnets 59 and St in the valve means 33 and 32, respectively, has beenreversed. When the well string 10 is moved upwardly so as to move pistonelement 31 upwardly within the housing 30, any fluid above pistonelement 50' will act on the enlarged end 57' so as to seatthe enlargedend 57' on the support 51. When this occurs, the enlarged end 53' andits seal 90' engages sleeve 61' so as to trap the fluid above the valveelement 57'.

However, such upward movement permits the valve element 50 to moveupwardly in response to pressure acting on its enlarged end 58, or inresponse to reduced pressure in 91, whereupon the enlarged end 53 movesupwardly to engage the support 51. When this occurs, the enlarged end 58and its seal 96 are moved out of engagement with the sleeve 61 whereuponwell fluids in the passage 22 which communicate with the passage 21between the spaced inflatable elements 11 and 12 are passed through thepassage 63, and then passage 53 of the sup port 51 into the chamber 91.

The cycle of pump operation described in FIG. 4 is then repeated. Inother words, well string 16 is lowered whereupon the fluids in thechamber or passage 91 are moved upwardly above the valve elementfitl'while fluid communication between the valve element 32 and the well borethrough the passage 21 is shut 011.

The next cycle of operation as described with regard to FIG. 5 is thenrepeated so as to draw well fluid in through the passage means 21,passage 22, passage means 68, and 53, and into the chamber 11.

The passages 22, 63, 53, 91, 22', 6 and 53 form a fluid passage meansthrough the outer housing 31) to conduct fluids therethrough in eitherdirection, as described hereinabove.

The foregoing permits the well string to be reciprocated so as to pumpthe formation 26 to obtain a sample of its fluids for further study andanalysis.

After the sample of the well fluid has been obtained,

the well tool 6 may then be removed from the well bore. Patent 2,831,541illustrates one form of the packer section 8, and the mandrel 15 may bemanipulated so as to deflate packers 11 and 12 whereupon the tool 6 maythen be removed from the well bore.

In order to accomplish functioning the release mechanism, the pistonelement 31 is non-rotatably connected to the housing 30 by suitablemeans such as the longi- 6 tudinally extending keys 1% on the outersurface of the element 31 which fit within the keyways 101 in the cap 46as shown in the drawings.

A limiting stop is provided on 31 to limit its downward movement as thewell string is reciprocated.

The valve means 32 is a stationary or standing valve and the valve means33 travels with piston element 31.

In some situations, the density of the fluid in the well bore will notbe as great, or greater than, the density of the fluid in well string16. When the pump section 7 is functioning, sleeves 61 and 61' shouldremain in their uppermost position as shown in FIGS. 4 and 5.Additionally, other factors may indicate the desirability of providing aconstruction wherein the area of the: sleeves 61 and 61' exposed to thepressure in bore 16 is diiierent from the area of the sleeves 61 and 61'exposed to the pressure in the well bore 9.

FIG. 6 illustrates one form of accomplishing this function. In FIG. 6,the pump section is illustrated generally by the numeral 7 and includestwo portions, one of which is the outer cylindrical housing 30 whichforms an extension on the mandrel of the packer section 8 as describedwith regard to FIGS. 1-5 hereinabove. The other portion 31 assumes thegeneral configuration of a piston which telescopically fits within thehousing 30 as previously described with regard to the form of theinvention shown in FIGS. l-S. The portion 31 is, of course, connected tothe well string 10 as described and shown in greater detail inconnection with FIG. 3 of the drawings.

The housing 30 includes vaive means designated generally by the numeral32, and the piston 31 also includes valve means designated generally bythe numeral 33. The valve means 32 in the housing and the valve means 33in the piston are constructed and arranged so that Well fluids may becirculated through the bore 16 of the well pipe 10 and through thepiston 31 and housing 30 in both directions to perform variousoperations in a manner as described with regard to FIGS. l-S; however,certain modifications have been made in the valve means 32 and 33 inthat the sleeves designated at 61a and 61a have been modified from thatas described with regard to the FIGS. 1-5 modification. It is to benoted that the other equivalent elements of the valves 32 and 33 arenumbered as they are numbered in FIGS. 1-5, inclusive.

However, sleeves 61a, 61a, and enlargements 58a and 58a on valveelements 50 and 50 are of slightly difierent construction so that thepresent invention may function even when the pressure of the fluid inthe well bore 9 or the density of the fluid in the well bore is suchthat it is the same as or possibly less than the pressure or density ofthe fluid in the bore 16 of the well string 10.

As illustrated in the drawings, the sleeve 61a is counterbored as shownat 67 which is similar to the counterbore of the sleeves 61 and 61 ofthe FIGS. 1-5, inclusive, modification. Additionally, a secondcounterbore 67a is provided in sleeve 61a which is somewhat larger thanthe internal diameter of the bore that extends through the sleeve 61abut which is somewhat smaller than the counterbore 67. Similarly, thesleeve 61a is provided with a counterbore 67' and an additionalcounterbore 67a which is slightly smaller than the counterbore 67', butwhich is slightly larger than the internal diameter of the bore thatextends through the sleeve 61a.

The enlargement 58a on the valve element 50 and the enlargement 5811' onthe valve element 50 are dime-nsioned so that the seals 90 and 90thereon will engage within the second counterbore 67a and 67a,respectively, of each of the sleeves 61a and 61a when the sleeves are intheir uppermost position.

Thus, when the valve element St) is seated as ll'lUS- trated in FIG. 6of the drawings so that seal 90 engages the wall of the counterbore 67ain the sleeve 61a, the efiective area of the sleeve 61a which is exposedto the fluid pressure within the chamber 91 of houslng 30 1s 8 smallerthan the effective area of the sleeve 61a that is exposed to the fluidpressure in the well bore and acting on its lower end beneath seal 62.

It can be appreciated that in a similar manner when the valve element50' is in its lowermost position, the seal engages the secondcounterbore 67a of the sleeve 61a in a manner as described with regardto valve element 50 hereinabove. This provides a smaller effective areaof the sleeve 61a that is exposed to the fluid pressure in the wellstring 19 than that which is exposed to the well bore and acting on thelower end of the sleeve 61a across seal 62.

It can be further appreciated that the area differential exposed to thefluid in the well string and exposed to the fluid in the well bore maybe varied as desired by changing the structural components in anysuitable manner as above noted. Thus, the pressure required to pump thesleeves 61a and 61a down or to cause them to move up against thebarriers 51 and 51' would be proportional to the areas exposed to thefluid pressure in the well string and in the well bore. For example, ifthe area of each of the sleeves 61a and 61a exposed to well borepressure and the area on each sleeve exposed to the fluid pressure inthe well string is in the ratio of 1.1 to 1, then the ratio of thepressure in the well string to the pressure in the well bore to eliectdownward movement of the sleeves 61a and 61a will likewise be 1.1 to 1.Of course, this ratio may be varied, and this example is given forpurposes of illustration only.

Under various well conditions and operation conditions, it may bedesirable to provide a construction wherein a differential area isprovided on the sleeves as hereinabove described.

Broadly, the present invention relates to a well tool which is adaptedto be anchored in a well bore whereupon the well string may bereciprocated so as to pump well fluids into the well string.

What is claimed is:

1. A well tool for connection with a tubular well string to be loweredinto a well bore comprising, a packer section, said section including atleast one inflatable packer element adapted to be inflated by fluid flowfrom the well string, a pump section connected in the well string abovesaid packer section, said pump section including telescoping portions,one of said portions being secured to the upper end of said packersection and the other of said portions being secured to the lower end ofthe well string, valve means in each of said portions responsive tofluid pressure in said well bore and responsive to fluid pressure in thewell string, said valve means so constructed and arranged when the fluidpressure in the well string is greater than the fluid pressure in thewell bore to conduct fluid pressure through said valve means in saidpacker section to inflate said packer element, said valve means soconstructed and arranged when the fluid pressure in the well bore isgreater than the fluid pressure in the well string after said packerelement has been inflated and upon reciprocation of the well string toconduct fluid pressure through said packer section to the well string.

2. A well tool for connection with a well string to be lowered into awell bore and anchored whereby the well string may be reciprocated topump well fluids therein including, anchor means for connection to awell string whereby the well tool may be positioned in a well bore, apump section connected in the well string above said anchor, said pumpsection including valve means therein, said valve means so constructedand arranged to conduct well fluid therethrough to actuate said anchormeans, said valve means operable after said anchor means is actuated andupon reciprocation of the well string to pump fluid in the well string.

3. The invention recited in claim 1 wherein said valve means in saidportion secured to said packer section is g a standing valve and whereinsaid valve means in said portion secured to the well string is atraveling valve.

4. The invention recited in claim 3 including a sleeve mounted in eachof said portions, seal means between said sleeve and said portions, portmeans in each of said portions for communicating well fluids to act onsaid sleeves, said sleeves each being slidable in their respectiveportion and relative to said valve means, said valve means eachincluding a movable valve element, means supporting each of saidelements in their respective portion, seal means on said element, saidsleeves movable in response to the fluid pressure in the well bore to aposition for engagement with said valve elements so that said valveelements may alternately open and close upon reciprocation of the wellstring to pump fluids in the well string.

5. A pump arrangement for anchoring in a well bore on a well stringwhereby fluid may be circulated down the well string through the pumparrangement and for pumping fluid up the well string including, an outerhousing, means for anchoring said housing in a well bore, said housinghaving a fluid passage therethrough, a valve element in said housing, asupport for said valve element, said support having flow passagestherethrough, said valve element having enlarged end portions wherebythe movement of said valve element relative to said support is limited,a sleeve in said housing, port means in said housing for communicatingfluid from the well bore to act on said sleeve and move it to a positionadjacent said valve element, seal means on said valve element wherebysaid valve element and sleeve may be sealably engaged to stop fluid flowthrough said housing in one direction, a piston sealably engaged withsaid housing above said support and adapted for connection with the wellstring for reciprocation thereby, said piston having a fluid passagetherethrough for communicating with the fluid passage through saidhousing, a valve element in said piston, a support for said piston valveelement, said support having flow passages therethrough, said pistonvalve element having enlarged end portions whereby the movement of saidpiston valve element within said piston is limited, a sleeve in saidpiston, port means in said housing and in said piston for communicatingfluid from the well bore to act on said piston.

sleeve and move it to a position adjacent said piston valve element,seal means on said piston valve element whereby said piston valveelement and piston sleeve may be sealably engaged to stop fluid flowthrough said piston in one direction, said housing valve element movableto close off flow through said housing when said piston moves towardsaid housing valve element and said piston valve element movable to opensaid piston to receive fluid from said housing when said piston movestoward said housing valve element, and said housing valve elementmovable to open flow into said housing when said piston moves away fromsaid housing valve element and said piston valve element movable toclose flow from said housing when said piston moves away from saidhousing valve element.

6. A pump arrangement tobe anchored in a well bore by an inflatableelement on a well string whereby the well string may be riciprocated topump well fluids into the well string including, an outer housing forconnection with the inflatable element to be anchored in a well bore, apiston in said housing for connection to the well string whereby saidpiston may be reciprocated within said anchored housing, said housingand piston having fluid passages for vcommunicating to initially inflatethe element and for thereafter communicating to pump Well fluids in thewell string, valve means in said housing and said piston, said valvemeans each including a valve element, a sleeve for surrounding each ofsaid valve elements, port means in said housing and piston forconducting well fluid to act on each of said sleeves, said sleevesresponsive to fluid pressure in said well string to move away from theirrespective element whereby fluid may be conducted through the wellstring, said sleeves responsive when the fluid pressure from the wellbore exceeds the fluid pressure in the well string to move in a positionto be engaged by said valve elements, said valve elements alternatelyengaging and disengaging their respective sleeve to open and close saidvalve means upon reciprocation of said piston means in said housing topump fluid up the well string through said valve means. a

7. A pump to be used with a packer section on a Well string whereby thepacker may be anchored in the well bore and then the well stringreciprocated to pump fluids from the well bore into the well stringincluding an outer housing for connection with the anchored packersection, a pistonfor connection with the well string and reciprocablewithin said housing, a valve means in each said housing and piston forcontrolling fluid flow therethrough, said valve means being inoperativeto pump fluid when the fluid pressure in the well string exceeds thefluid pressure in the well bore, means to communicate the fluid pressurein the well to said housing and piston, a sleeve slidably mounted ineach said piston and housing and responsive when the Well bore fluidpressure exceeds the fluid pressure in the well string to move to apredetermined position relative to said valve means in said piston andhousing, seal means between said sleeves and said piston and housing,said valve means in said piston and housing each including a valveelement, said valve elements movable to contact an adjacent sleeve toclose flow through said valve means in said piston and housing, saidvalve elements moving in opposite directions relative to each other assaid piston is reciprocated in said housing whereby said valve meansalternately open and close to pump well fluids upwardly through the wellstring.

8. The invention recited in claim 5 wherein said piston sleeve andhousing sleeve are concentrically mounted respectively in said pistonand in said housing and wherein said housing includes an annularshouldermeans to limit the travel of said piston.

9. The combination recited in claim 5 including a guide concentric withand radially spaced within each of said piston and said housing, andwherein said piston sleeve and housing sleeve are concentrically mountedwithin said piston and housing recepectively and surround theirrespective guides to be guided by said guides, and seal means betweensaid guides and said sleeves to inhibit leakage of fluid therebe'tween.

10. A well pump for anchoring in a wellbore on a Well 1 string includingan outer cylindrical housing, means to anchor said housing in a wellbore, a piston for securing to a well string and reciprocably mounted insaid housing, valve means in said housing and said piston, sleeve meansin said housing and piston, said housing having passage means thereinfor communicating well fluid to act on said sleeve means, said sleevemeans responsive to the fluid pressure in the well string to positionsaid sleeve means relative to said valve means whereby said valve meansin said housing and piston permitsv fluid flow through said housing andpiston in one direction, and said sleeve means responsive to fluidpressure in the well bore in excess of the fluid pressure in the wellstring to position said sleeve means relative to said housing and pistonvalve means whereby reciprocation of the well string moves fluid throughsaid housing and piston in the other direction.

11. A well pump for anchoring in a well bore on a well string includingan outer cylindrical housing, means to anchor said housing in a wellbore, a piston for securing to a well string and reciprocably mounted insaid housing, valve means in said housing and said piston, means todeactivate said housing and piston valve means to permit fluid flowtherethrough in one direction, said last named means responsive to fluidpressure in the well bore to effect actuation of said housing and pistonvalve means upon reciprocation of the well string to move fluid throughsaid valve means in the opposite direction.

12. The combination recited in claim 11 wherein said means to deactivateand effect actuation of said housing 1 1" and piston means includes asleeve in said piston and in said housing responsive to fiuid pressurein said Well string and in the well bore to move to deactivate andeifect actuation of said valve means.

13. The combination recited in claim 12 including guide means in saidhousing and piston to guide said sleeves as they move in said housingand piston.

14. A well pump for anchoring in a well bore on a well string includingan outer cylindrical housing, means to anchor said housing in a Wellbore, a piston for securing to a well string and reciprocably mountedinsaid housing, valve means in said housing and said piston, and meansin said housing and piston to deactivate said valve means whereby fluidmay be conducted therethrough in 1 2 one direction, said last namedmeans responsive to an excess of fluid pressure in the well bore overthe fluid preS- sure in the well string to move in said housing and saidpiston whereby fluid may be conducted therethrough only in a directionopposite to the first mentioned direction.

References Cited in the file of this patent UNITED STATES PATENTS1,625,674 Newburn Apr. 19, 1927 2,103,940 Fletcher Dec. 28, 19372,749,992 Hill June 12, 1956 2,778,431 Lynes Jan. 22, 1957 2,831,541Conover Apr. 22, 1958 2,951,539 Malone et al Sept. 6, 1960

2. A WELL TOOL FOR CONNECTION WITH A WELL STRING TO BE LOWERED INTO A WELL BORE AND ANCHORED WHEREBY THE WELL STRING MAY BE RECIPROCATED TO PUMP WELL FLUIDS THEREIN INCLUDING, ANCHOR MEANS FOR CONNECTION TO A WELL STRING WHEREBY THE WELL TOOL MAY BE POSITIONED IN A WELL BORE, A PUMP SECTION CONNECTED IN THE WELL STRING ABOVE SAID ANCHOR, SAID PUMP SECTION INCLUDING VALVE MEANS THEREIN, SAID VALVE MEANS SO CONSTRUCTED AND ARRANGED TO CONDUCT WELL FLUID THERETHROUGH TO ACTUATE SAID ANCHOR MEANS, SAID VALVE MEANS OPERABLE AFTER SAID ANCHOR MEANS IS ACTUATED AND UPON RECIPROCATION OF THE WELL STRING TO PUMP FLUID IN THE WELL STRING. 